This commit was generated by cvs2svn to compensate for changes in r2,

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1 files changed, 360 insertions, 0 deletions

diff --git a/adns-0.6/src/general.c b/adns-0.6/src/general.c
new file mode 100644
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--- /dev/null
+++ b/adns-0.6/src/general.c
@@ -0,0 +1,360 @@
+/*
+ * general.c
+ * - diagnostic functions
+ * - vbuf handling
+ */
+/*
+ *  This file is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *
+ *  It is part of adns, which is
+ *    Copyright (C) 1997-1999 Ian Jackson <ian@davenant.greenend.org.uk>
+ *    Copyright (C) 1999 Tony Finch <dot@dotat.at>
+ *  
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2, or (at your option)
+ *  any later version.
+ *  
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *  
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software Foundation,
+ *  Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
+ */
+
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#include "internal.h"
+
+/* Core diagnostic functions */
+
+void adns__vdiag(adns_state ads, const char *pfx, adns_initflags prevent,
+		 int serv, adns_query qu, const char *fmt, va_list al) {
+  const char *bef, *aft;
+  vbuf vb;
+  
+  if (!ads->diagfile ||
+      (!(ads->iflags & adns_if_debug) && (!prevent || (ads->iflags & prevent))))
+    return;
+
+  if (ads->iflags & adns_if_logpid) {
+    fprintf(ads->diagfile,"adns%s [%ld]: ",pfx,(long)getpid());
+  } else {
+    fprintf(ads->diagfile,"adns%s: ",pfx);
+  }
+
+  vfprintf(ads->diagfile,fmt,al);
+
+  bef= " (";
+  aft= "\n";
+
+  if (qu && qu->query_dgram) {
+    adns__vbuf_init(&vb);
+    fprintf(ads->diagfile,"%sQNAME=%s, QTYPE=%s",
+	    bef,
+	    adns__diag_domain(qu->ads,-1,0, &vb,
+			      qu->query_dgram,qu->query_dglen,DNS_HDRSIZE),
+	    qu->typei ? qu->typei->rrtname : "<unknown>");
+    if (qu->typei && qu->typei->fmtname)
+      fprintf(ads->diagfile,"(%s)",qu->typei->fmtname);
+    bef=", "; aft=")\n";
+    adns__vbuf_free(&vb);
+  }
+  
+  if (serv>=0) {
+    fprintf(ads->diagfile,"%sNS=%s",bef,inet_ntoa(ads->servers[serv].addr));
+    bef=", "; aft=")\n";
+  }
+
+  fputs(aft,ads->diagfile);
+}
+
+void adns__debug(adns_state ads, int serv, adns_query qu, const char *fmt, ...) {
+  va_list al;
+
+  va_start(al,fmt);
+  adns__vdiag(ads," debug",0,serv,qu,fmt,al);
+  va_end(al);
+}
+
+void adns__warn(adns_state ads, int serv, adns_query qu, const char *fmt, ...) {
+  va_list al;
+
+  va_start(al,fmt);
+  adns__vdiag(ads," warning",adns_if_noerrprint|adns_if_noserverwarn,serv,qu,fmt,al);
+  va_end(al);
+}
+
+void adns__diag(adns_state ads, int serv, adns_query qu, const char *fmt, ...) {
+  va_list al;
+
+  va_start(al,fmt);
+  adns__vdiag(ads,"",adns_if_noerrprint,serv,qu,fmt,al);
+  va_end(al);
+}
+
+/* vbuf functions */
+
+void adns__vbuf_init(vbuf *vb) {
+  vb->used= vb->avail= 0; vb->buf= 0;
+}
+
+int adns__vbuf_ensure(vbuf *vb, int want) {
+  void *nb;
+  
+  if (vb->avail >= want) return 1;
+  nb= realloc(vb->buf,want); if (!nb) return 0;
+  vb->buf= nb;
+  vb->avail= want;
+  return 1;
+}
+  
+void adns__vbuf_appendq(vbuf *vb, const byte *data, int len) {
+  memcpy(vb->buf+vb->used,data,len);
+  vb->used+= len;
+}
+
+int adns__vbuf_append(vbuf *vb, const byte *data, int len) {
+  int newlen;
+  void *nb;
+
+  newlen= vb->used+len;
+  if (vb->avail < newlen) {
+    if (newlen<20) newlen= 20;
+    newlen <<= 1;
+    nb= realloc(vb->buf,newlen);
+    if (!nb) { newlen= vb->used+len; nb= realloc(vb->buf,newlen); }
+    if (!nb) return 0;
+    vb->buf= nb;
+    vb->avail= newlen;
+  }
+  adns__vbuf_appendq(vb,data,len);
+  return 1;
+}
+
+int adns__vbuf_appendstr(vbuf *vb, const char *data) {
+  int l;
+  l= strlen(data);
+  return adns__vbuf_append(vb,data,l);
+}
+
+void adns__vbuf_free(vbuf *vb) {
+  free(vb->buf);
+  adns__vbuf_init(vb);
+}
+
+/* Additional diagnostic functions */
+
+const char *adns__diag_domain(adns_state ads, int serv, adns_query qu,
+			      vbuf *vb, const byte *dgram, int dglen, int cbyte) {
+  adns_status st;
+
+  st= adns__parse_domain(ads,serv,qu,vb, pdf_quoteok, dgram,dglen,&cbyte,dglen);
+  if (st == adns_s_nomemory) {
+    return "<cannot report domain... out of memory>";
+  }
+  if (st) {
+    vb->used= 0;
+    if (!(adns__vbuf_appendstr(vb,"<bad format... ") &&
+	  adns__vbuf_appendstr(vb,adns_strerror(st)) &&
+	  adns__vbuf_appendstr(vb,">") &&
+	  adns__vbuf_append(vb,"",1))) {
+      return "<cannot report bad format... out of memory>";
+    }
+  }
+  if (!vb->used) {
+    adns__vbuf_appendstr(vb,"<truncated ...>");
+    adns__vbuf_append(vb,"",1);
+  }
+  return vb->buf;
+}
+
+adns_status adns_rr_info(adns_rrtype type,
+			 const char **rrtname_r, const char **fmtname_r,
+			 int *len_r,
+			 const void *datap, char **data_r) {
+  const typeinfo *typei;
+  vbuf vb;
+  adns_status st;
+
+  typei= adns__findtype(type);
+  if (!typei) return adns_s_unknownrrtype;
+
+  if (rrtname_r) *rrtname_r= typei->rrtname;
+  if (fmtname_r) *fmtname_r= typei->fmtname;
+  if (len_r) *len_r= typei->rrsz;
+
+  if (!datap) return adns_s_ok;
+  
+  adns__vbuf_init(&vb);
+  st= typei->convstring(&vb,datap);
+  if (st) goto x_freevb;
+  if (!adns__vbuf_append(&vb,"",1)) { st= adns_s_nomemory; goto x_freevb; }
+  assert(strlen(vb.buf) == vb.used-1);
+  *data_r= realloc(vb.buf,vb.used);
+  if (!*data_r) *data_r= vb.buf;
+  return adns_s_ok;
+
+ x_freevb:
+  adns__vbuf_free(&vb);
+  return st;
+}
+
+
+#define SINFO(n,s) { adns_s_##n, #n, s }
+
+static const struct sinfo {
+  adns_status st;
+  const char *abbrev;
+  const char *string;
+} sinfos[]= {
+  SINFO(  ok,                  "OK"                                            ),
+
+  SINFO(  nomemory,            "Out of memory"                                 ),
+  SINFO(  unknownrrtype,       "Query not implemented in DNS library"          ),
+  SINFO(  systemfail,          "General resolver or system failure"            ),
+
+  SINFO(  timeout,             "DNS query timed out"                           ),
+  SINFO(  allservfail,         "All nameservers failed"                        ),
+  SINFO(  norecurse,           "Recursion denied by nameserver"                ),
+  SINFO(  invalidresponse,     "Nameserver sent bad response"                  ),
+  SINFO(  unknownformat,       "Nameserver used unknown format"                ),
+
+  SINFO(  rcodeservfail,       "Nameserver reports failure"                    ),
+  SINFO(  rcodeformaterror,    "Query not understood by nameserver"            ),
+  SINFO(  rcodenotimplemented, "Query not implemented by nameserver"           ),
+  SINFO(  rcoderefused,        "Query refused by nameserver"                   ),
+  SINFO(  rcodeunknown,        "Nameserver sent unknown response code"         ),
+  
+  SINFO(  inconsistent,        "Inconsistent resource records in DNS"          ),
+  SINFO(  prohibitedcname,     "DNS alias found where canonical name wanted"   ),
+  SINFO(  answerdomaininvalid, "Found syntactically invalid domain name"       ),
+  SINFO(  answerdomaintoolong, "Found overly-long domain name"                 ),
+  SINFO(  invaliddata,         "Found invalid DNS data"                        ),
+
+  SINFO(  querydomainwrong,    "Domain invalid for particular DNS query type"  ),
+  SINFO(  querydomaininvalid,  "Domain name is syntactically invalid"          ),
+  SINFO(  querydomaintoolong,  "Domain name is too long"                       ),
+
+  SINFO(  nxdomain,            "No such domain"                                ),
+  SINFO(  nodata,              "No such data"                                  )
+};
+
+static int si_compar(const void *key, const void *elem) {
+  const adns_status *st= key;
+  const struct sinfo *si= elem;
+
+  return *st < si->st ? -1 : *st > si->st ? 1 : 0;
+}
+
+static const struct sinfo *findsinfo(adns_status st) {
+  return bsearch(&st,sinfos,sizeof(sinfos)/sizeof(*sinfos),sizeof(*sinfos),si_compar);
+}
+
+const char *adns_strerror(adns_status st) {
+  const struct sinfo *si;
+
+  si= findsinfo(st);
+  return si->string;
+}
+
+const char *adns_errabbrev(adns_status st) {
+  const struct sinfo *si;
+
+  si= findsinfo(st);
+  return si->abbrev;
+}
+
+
+#define STINFO(max) { adns_s_max_##max, #max }
+
+static const struct stinfo {
+  adns_status stmax;
+  const char *abbrev;
+} stinfos[]= {
+  { adns_s_ok, "ok" },
+  STINFO(  localfail   ),
+  STINFO(  remotefail  ),
+  STINFO(  tempfail    ),
+  STINFO(  misconfig   ),
+  STINFO(  misquery    ),
+  STINFO(  permfail    )
+};
+
+static int sti_compar(const void *key, const void *elem) {
+  const adns_status *st= key;
+  const struct stinfo *sti= elem;
+
+  adns_status here, min, max;
+
+  here= *st;
+  min= (sti==stinfos) ? 0 : sti[-1].stmax+1;
+  max= sti->stmax;
+  
+  return here < min  ? -1 : here > max ? 1 : 0;
+}
+
+const char *adns_errtypeabbrev(adns_status st) {
+  const struct stinfo *sti;
+
+  sti= bsearch(&st,stinfos,sizeof(stinfos)/sizeof(*stinfos),sizeof(*stinfos),sti_compar);
+  return sti->abbrev;
+}
+
+
+void adns__isort(void *array, int nobjs, int sz, void *tempbuf,
+		 int (*needswap)(void *context, const void *a, const void *b),
+		 void *context) {
+  byte *data= array;
+  int i, place;
+
+  for (i=0; i<nobjs; i++) {
+    for (place= i;
+	 place>0 && needswap(context, data + (place-1)*sz, data + i*sz);
+	 place--);
+    if (place != i) {
+      memcpy(tempbuf, data + i*sz, sz);
+      memmove(data + (place+1)*sz, data + place*sz, (i-place)*sz);
+      memcpy(data + place*sz, tempbuf, sz);
+    }
+  }
+}
+
+/* SIGPIPE protection. */
+
+void adns__sigpipe_protect(adns_state ads) {
+  sigset_t toblock;
+  struct sigaction sa;
+  int r;
+
+  if (ads->iflags & adns_if_nosigpipe) return;
+
+  sigfillset(&toblock);
+  sigdelset(&toblock,SIGPIPE);
+
+  sa.sa_handler= SIG_IGN;
+  sigfillset(&sa.sa_mask);
+  sa.sa_flags= 0;
+  
+  r= sigprocmask(SIG_SETMASK,&toblock,&ads->stdsigmask); assert(!r);
+  r= sigaction(SIGPIPE,&sa,&ads->stdsigpipe); assert(!r);
+}
+
+void adns__sigpipe_unprotect(adns_state ads) {
+  int r;
+
+  if (ads->iflags & adns_if_nosigpipe) return;
+
+  r= sigaction(SIGPIPE,&ads->stdsigpipe,0); assert(!r);
+  r= sigprocmask(SIG_SETMASK,&ads->stdsigmask,0); assert(!r);
+}